Laravel where :: model, how to add multi statement

So how i can add multi statement to query in ::where model.

Actually it lok like that: certs::where('unique', '=', $newUnique )->get()

i need somethig like that:

certs::where('unique, num', '=', $newUnique,$key )->get()

so in sql look like that

Select * From certs Where unique = $newUnique AND num = $key

I need that to check if data need to be updated or inserted.

via Chebli Mohamed